Pipe-lock



L. M. LANNING.

PIPE LOC K. APPLICATION mzo JAN.22.' 1920.

1,359,900. 7 PatentedNm23 192b 3 SHEETS-SHEET l.

U 5'0! INVENTOR.

ATTORNEYS.

L. M. LANNING.

Pl'PE LOCK.

APPLICATION man JAN. 22. 1920.

1,359,900. Patented Nov. 23,1920.

2 SHEETS-SHEET 2.

BY W 4 E ATTORN Y5.

* UNITED. stares PA NTworries.

' LEONARD M. LANNING, or wALLA .wALLe, WASHINGTON,

PIrE-LooK.

To all whom it may concern: I

I Be it known that I, Lnoni nn M. LANNING, a citizen of the UnitedStates, residin at Walla Walla, in the county of l ialla ll alla andState of Washington, have invented certain new and useful Improvementsin Pipe- Locks, of which the following is a specification.

which yieldingly locks in a manner to pro-f vide compensation forexpansion and con--- traction. due to varying temperatures.

With these and other objects in view refer ence is had to theaccompanying drawings in whichi L Figure 1 shows theapplication of thedevice on a pipeinserted into a large opening;

Fig. 2 shows the pipe inserted into an opening of correct size;

Fig. 3 is a plan view of a modified form of draw bar; Fig. 3 is asectional view of the modified form of drawbar;

Fig. a shows a string of pipe supported from below 7 bar;

Fig. 5 shows the device attached to the in terior. of the pipe; I

Fig. 6 shows an end elevation of the draw- Fig. 7 shows a side elevationof the draw bar 8 is a plan view of the draw bar; Fig. 9 is a sideelevation of the spring lock;

and

Fig. 10 is a plan view of the spring lock.

In the drawings like numerals refer to like I parts throughout and thenumeral 1 refers to the pipe which, as shown in the drawings isrepresented as stove pipe although it must be understood that the deviceis equally applicable to any suspended pipe.

2 represents a section of flue having the usual opening 3 into which thepipe is to be locked by means of the draw bar 4: and the lock 5.

The draw bar consists of a hook portion 6 and a shank portion 7, theshank portion being bent as at 8 Fig. 7 to produce a snug relates topipe locks and Specification of Letters Patent. 23, 1920; Applicationfiled January 22, 1920. Serial No. 353,178. I

which a latch, to be described, seats for the g locking purpose. I

'Inthe end of the shank barbs 10 are provided which'are intendedtoiengage the edge 11' of the slot'12 through which the shank projects,to prevent accidental "removal of the drawbar while placing :orremovingthe i i A guide :rneinb erv 13 is attachedtothe inner side of the. pipeand slidablyfimounts the draw bardand is positioned in the pipe in amanner to cover the slot 12 to prevent a smoke leak therethrough. l

ttached to the pipe, and positioned therei I on to'coeperatinglyengagethedraw'zbar, 1

the lock 5 consisting of a'plate 14 which-car'- ries lugs 15 which inturn'bear the crankarm 16 journaled therein." Atongue l7 is 'jour-;

naled on the crank a'rm and engagesa spring I 18 which is' interp'osedbetween the'tongue.

and the latch 19, the latch having a bent end I v r 20 which seats intothe aforementioned apere tures 9 of the draw bar. I

It will be noted by reference to Fig. 9 that i the crank'arm 16 isjournaled in the lugs 15v ofi center so that when the tongue 17. is

brought down to the locked position there will be no danger of theaccidental unlocking of the device.

Fig. 3 shows a modifiedform of draw.

'90 7* for use on the pipe directly inwhich case the pipe, to which thedraw bar is attached, v I

becomes in a mannerthe sliding member 'of the draw bar, the pipe beingdrawn upon the adjoining pipe by means of the lock;

Thislock, through the mediumof the spring, provides a yielding pressureon the draw bar and thus as the expansion and contraction occurs, due tothe varying temperature, the pull remains constant andthe joint. isconstantly maintained in its tightest position.

It is shown by reference to Figs. 1 and 2 that the"hook portion 6 ofthedraw bar j i i is of suflicientlength to engage the inner wall of theflue whether the hole 3 is or is not of the proper size, thus-regardlessof the size'of the hole a secure lock is obtained thereon.

In the case of long strings of pipe as shown in Fig. A: the lock will beplaced beneath the pipe thus forming asuspension.

joint of sufiicient strength to maintain a rigid string; and as shown inFig. 5 the lock may be installed within the pipe with equal efiiciency;in this case however the slot 12 will be omitted and the guide membermay also have the slight modification shown in Fig. 5.

In use the lock 5 and the drawbar 7* is riveted or otherwise fastened tothe pipe previous to erection, and the draw bar 7 is placed in the guidemember, the barb 10 snapping past the edge 11 of the slot 12. The fluejoint is now inserted and locked in place and thecollar 21 brought toposition against the wall of the chimney. The elbow 22 (or I16 Xi30l11l3) is now applied and locked and thus throughout the assembling ajoint is added and locked until the work is completed. V

In the case of the locks being within the .pipe the locking isaccomplished by inserting the arm and performing the locking operationtherein. 7 v

Having thus described my invention, I

claim- I 1. In a pipe lock, a draw bar, and. a lock composed of a plate,lugs extending upward from said plate, a crank arm pivotally mounted insaid lugs, a tongue journale d on said crank arm and engaging a spring,a latch, a spring interposed between said tongue and said latch, saidlock attached to the pipe and positioned thereon to cooperatingly engagesaid draw bar.

2. In a pipe lock, a draw bar, said draw bar consisting of a hookportion and a shank portion, a guide member attached to said pipe andslidably mounting said draw bar, and a lock composed of a plate, lugsextending upward from said plate, a crank arm 'pivotally mounted on saidlugs, a tongue ournaled in said crankarm and engaging a spring, a latch,a spring interposed between said tongue and said lctch, said look at-.tached to the pipe and positioned thereon to oooperatingly engage saiddraw bar.

3. In a pipe look, a draw .bar, said draw bar consisting of a hookportion and .a shank portion, a guide nien'iber attached to said.

pipe and slidably mounting said draw bar, a slot in said pipe throughwhichsaid shank portion projects, said guide member being positioned insaid pipe to cover said slot,

and a look attached to the pipe and posisitioned thereon tocooperatingly engage said draw bar. 7,

In testimony whereof I affixmy signature.

LEONARD M. VLANYNING.

